20481345

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{653}}^1$

素因数の和:722

約数の個数: 48

約数和(自身を含む): 38565072

約数和(自身を除く): 18083727

約数列:

[1, 3, 5, 9, 15, 17, 41, 45, 51, 85, 123, 153, 205, 255, 369, 615, 653, 697, 765, 1845, 1959, 2091, 3265, 3485, 5877, 6273, 9795, 10455, 11101, 26773, 29385, 31365, 33303, 55505, 80319, 99909, 133865, 166515, 240957, 401595, 455141, 499545, 1204785, 1365423, 2275705, 4096269, 6827115, 20481345]

約数ペア:

[(1, 20481345), (3, 6827115), (5, 4096269), (9, 2275705), (15, 1365423), (17, 1204785), (41, 499545), (45, 455141), (51, 401595), (85, 240957), (123, 166515), (153, 133865), (205, 99909), (255, 80319), (369, 55505), (615, 33303), (653, 31365), (697, 29385), (765, 26773), (1845, 11101), (1959, 10455), (2091, 9795), (3265, 6273), (3485, 5877)]